Blue-Girdled Webcap
Cortinarius collinitus · Family Cortinariaceae · Updated October 2026
467US records
31states
Octbusiest month
467 US records since 1896 (88 in the last 10 years)
Last seen Oct 18, 2025 (about 12 months ago) in Lewis County, WA, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from New Jersey, California and Washington, and the busiest months are Oct, Aug and Sep. (Data as of October 26, 2026; records can lag by weeks.)
⚠ Never eat a wild mushroom based on this site. We show where fungi have been recorded, nothing more. We never say any mushroom is edible or safe, and you shouldn't decide that from any website, app or photo. Many deadly mushrooms look like harmless ones. If someone may have eaten a wild mushroom, call Poison Control at 1-800-222-1222 right away.
☠ Dangerous genus. The genus Cortinarius includes webcaps containing orellanine. Mushrooms in this group have caused serious or fatal poisonings.
Lookalike warning. Many mushrooms, including deadly ones, closely resemble each other, and the only reliable identification comes from an expert looking at the actual specimen (often with spore prints or microscopy). Never use a name, photo or record count on this page to decide what something is.
When it's recorded
Records by month, all years. Busiest: Oct, Aug, Sep.
Where it's recorded
Top counties
- Sussex County, NJ (36) · latest Sep 28, 2019
- Ocean County, NJ (31) · latest Oct 25, 2020
- Mercer County, NJ (23) · latest May 4, 2019
- Morris County, NJ (22) · latest Jul 20, 2019
- Mendocino County, CA (21) · latest Oct 26, 1986
- Burlington County, NJ (19) · latest Oct 6, 2018
- Clallam County, WA (17) · latest Sep 21, 2001
- Santa Barbara County, CA (15) · latest Jan 13, 2023
- Hunterdon County, NJ (15) · latest Aug 25, 2019
- Skagit County, WA (14) · latest Sep 4, 1999
More on this species from GBIF.
Bring along
🍄
Regional mushroom field guideSee on Amazon🍄
Folding mushroom knife with brushSee on Amazon🍄
Wicker foraging basketSee on Amazon🍄
10x hand lens / loupeSee on Amazon🍄
Spore print paperSee on AmazonAs an Amazon Associate we earn from qualifying purchases.